Gamecube loader, classic controller support?

So I've been wondering this for awhile now. Is it possible to create some sort of homebrew that loads gamecube games, but remaps classic controller buttons to gamecube input? Since Nintendo is so stupid for not letting us use the classic controller in the first place...
I don't know a whole lot about the wii architecture, just stuff like basic IOS knowledge, etc. But it seems like it could be possible.